MZGuard
Spectra logoSpectra

See every connection your PC makes. Decide what to block.

Spectra watches the network of your Windows computer, program by program, and shows where the data goes and from which country. When something is not right you act: block a program or an address with one click.

Windows 10 and 11, 64-bit · No .NET install needed · The free version works entirely on your computer

Spectra firewall: every program with its inbound and outbound status, blocked and allowed

See the traffic move, minute by minute

The graph draws download and upload as two curves over time. When a program connects to the network for the first time, its icon appears on the timeline with a NEW badge: you see the moment it started.

Spectra graph: download and upload traffic over time, with programs marked on the timeline
Graph view: download and upload over the last five minutes, with the timeline below to scroll back through the session.
Zoom on the timeline: program icons with NEW badges
New programs: the icon and the NEW badge mark a program that just connected. The number after the plus counts its other new connections.
Zoom on a traffic peak in the graph
Peaks: a spike is a burst of download or upload. The timeline shows the minute it happened.

Built to be read in a glance

Spectra does not drown you in numbers. Each view answers one question: which program is talking, to whom, and how much. The data always covers the last five minutes, and you can open a longer history.

Free

Live traffic by application, host, service and country

Four columns, one per question. Each row carries a bar, so the biggest talker stands out without reading a single number.

  • Applications, remote hosts, traffic types and countries, sorted by bytes
  • Hosts shown as names or as IP addresses, one click to switch
  • Download and upload speeds, and the share of WAN and LAN traffic
Spectra columns view: applications, remote hosts, traffic types and countries ranked by bytes
Free

Globe and map, live

The same connections, shown two ways: on a 3D globe, and on a flat world map with your public address and the direction of each flow.

  • 3D globe with the live connections, drawn while its tab is open
  • Flat world map with your public address and each connection on its route
  • Amber for download, pink for upload: the colours are the same on both views
Spectra globe and map: live connections drawn on the globe, and the public map with the flow from this computer
Free

Every connection, with its process

The connections tab lists each socket with the program that owns it, its local and remote address, and its state. Nothing is hidden behind a summary.

  • Program name, path and remote endpoint for every socket
  • Filter by program, address or port
  • Start from a connection and block it, when it is not expected
Spectra connections list: each socket with its protocol, state, remote endpoint, country, service and process

A firewall you can read

Blocking a program should be a decision you understand. Spectra's firewall shows, for each application, what it may receive and what it may send, and it applies the rules to the Windows firewall engine so they keep working when Spectra is closed.

Pro

Allow or block each program, in each direction

The firewall lists every active application with its inbound and outbound status. Click to block, and the rule is saved and applied again at the next start.

  • Separate inbound and outbound rules for each program
  • Blocks by address, by address range and by domain
  • Security options: hardening of the TCP/IP stack, anti-spoofing, risky ports blocked towards the Internet, management from the Internet refused
  • System processes are protected: Spectra will not block them by mistake
Zoom on the firewall: curl.exe and VyprVPNService.exe blocked inbound and outbound
Spectra firewall controls: the firewall switch, profile, mode, search and the blocked-only filter
Controls: the switch turns the firewall on and off, the mode decides whether a new program is blocked or asked about.
Spectra firewall rules table: each application with its inbound and outbound status
Rules per application: inbound and outbound status side by side, with the traffic of each program.

Scanners, resources and an assistant that answers

The rest of the monitor keeps watch on the local network and on the computer itself. The assistant is the part that helps you understand what you see.

Free

Scanner of the local network

Spectra lists the devices of your network and classifies them: router, computer, printer, device with open services. A scan takes seconds and changes nothing on the network.

  • Device name, manufacturer and open services
  • Detection of port scans against this PC, with alerts
Spectra scanner page listing devices on the local network
Free

Resources of the computer

A view of the computer's own resources, next to the network, so you can tell a slow machine from a busy network.

Spectra resources page
Pro

AI assistant on your own data

Ask in plain language: are there anomalies in this session, what is that program talking to, what should I check. The assistant reads the alerts, the programs, the connections and the blocks, and it advises. It never blocks anything: the decision stays with you.

  • Nothing runs in the background: the assistant answers only when you ask
  • Works without any key of your own: the AI service is included in Pro
  • Up to 300 questions per month for each licence
Spectra network specialist assistant chat window

Your data stays on your computer

Spectra is built to show you your network, not to collect it. Here is exactly what leaves the computer and what does not.

Free versionEverything runs locally. Spectra does not send your traffic, your programs or your addresses anywhere.
Pro assistantWhen you ask a question, the question and a summary of the session (alerts, programs, connections, blocks) go to the MZGuard licence server, which forwards them to the AI model. The server keeps the licence record and a monthly counter, not the conversation.
LicenceActivation sends the licence key and an identifier of the computer. The licence is renewed in the background while the computer is online.

Free, or Pro for one payment

The free version is a complete monitor. Pro adds the firewall, the activity log and the assistant. There is no subscription: you pay once for each computer.

Spectra Free

USD 0

For as long as you want

  • Live traffic by application, host, service and country
  • Graph, globe and map
  • Every connection with its process
  • Alerts and port-scan detection
  • Scanner of the local network and resources view
Download free

Free and Pro, side by side

The same monitor in both versions. Pro adds the parts that act on the network and the parts that explain it.

FeatureFreePro
Live traffic by application, host, service and country✓✓
Graph, 3D globe and map✓✓
Every connection with its process✓✓
Alerts and port-scan detection✓✓
Scanner of the local network and resources view✓✓
Firewall per application, inbound and outbound—✓
Blocks by address, range and domain—✓
Network security options—✓
Activity log with daily files—✓
AI assistant on your data (up to 300 questions a month)—✓
PriceUSD 0USD 19.59

Questions

Is Spectra free?

Yes. The free version monitors every connection live, with alerts, port-scan detection, the LAN scanner and the resources view. Pro adds the firewall, the activity log and the AI assistant.

Does Spectra send my data anywhere?

The free version works entirely on your computer. The Pro assistant sends your question and a summary of the session to the MZGuard licence server, which forwards it to the AI model. The server does not store the conversation.

Does Spectra need administrator rights?

Yes. The byte counters and the firewall need them, so Spectra asks for them when it starts. Only one copy runs at a time.

How many computers does a Pro licence cover?

One computer. The key is bound to the computer where it is activated. If you need to move it, contact us.

What happens if the computer stays offline?

Pro keeps working offline for about two months after the last renewal. After that Spectra returns to the free version until the computer is back online.

Which Windows versions are supported?

Windows 10 and Windows 11, 64-bit. Spectra is self-contained: it does not need a separate .NET installation.

Is there a subscription?

No. Pro is one payment for one computer. The licence renews itself in the background while the computer is online.

See what your computer is saying

Download Spectra free, and unlock the firewall when you need it.

Requirements: Windows 10 or 11, 64-bit, administrator rights · Setup about 57 MB